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Practical Tools for Simple Ergonomic Evaluations

Practical Tools for Simple Ergonomic Evaluations. Scott E. Singer, MD, MPH Lake County Safety Council August 19, 2005. Overview. About the speaker Background The Model Questions. About the Speaker. Scott E. Singer, MD, MPH. Specialty: Occupational Medicine

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Practical Tools for Simple Ergonomic Evaluations

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  1. Practical Tools forSimple Ergonomic Evaluations Scott E. Singer, MD, MPH Lake County Safety Council August 19, 2005

  2. Overview • About the speaker • Background • The Model • Questions

  3. About the Speaker

  4. Scott E. Singer, MD, MPH • Specialty: Occupational Medicine • MPH = Masters in Public Health • MEDSource One • Lincoln Electric Corporate Medical Director

  5. The Model

  6. The Model Introduction • Derived from more comprehensive model developed at University of Michigan. • Simplified for use by “non-ergonomists”. • Can be applied to any type of work environment. • Designed to provide specific recommendations for ergonomic intervention. • Does not allow for recognition of other safety or hazard issues.

  7. The Model General Principles • Thorough knowledge of job purpose and responsibilities. • Review of written materials including: work standards, production data, job descriptions, etc. • Personnel interviews: management, supervisors, laborers. • Direct Observation. • Real time analysis • Videotape review

  8. The Model Job Documentation • Job name / title • Work purpose / objectives • Work schedule • Job rotation plan • Production information / quota • Workstation / equipment • Materials • Tools • PPE • Environment

  9. The Model Observation Parameters 5 Basic Elements: • Repetition / Repetitive Exertions • Postural Stresses • Forceful Exertions • Localized Contact Stresses • Miscellaneous

  10. The Model Repetitive Exertions • Rated on a scale of 0-10. • 0: mostly idle; no regular exertions. • 2: short periods of activity separated by long pauses. • 4: slow, steady activity; frequent, brief pauses. • 6: moderate, steady activity; infrequent, brief pauses. • 8: rapid, steady activity; no regular pauses. • 10: rapid, steady activity; no pauses. • Consider recovery time in and between cycles.

  11. The Model Postural Stresses • Rated on a scale of 0-10. • 0: Only neutral posture observed. • 10: Extreme posture. • Assess both “peak” and “average” ratings. • “Peak” = Worst posture observed during the cycle. • “Average” takes in to account severity and duration of postures. • All potentially affected joints should be rated separately.

  12. The Model Forceful Exertions • Rated on a scale of 0-10. • 0: Relaxed effort; fluid movements; no apparent resistance. • 10: Extreme effort. • Assess both “peak” and “average” ratings. • “Peak” = Maximum observed exertion. • “Average” is dependent on length, frequency and magnitude of exertions. Should reflect force exerted over entire work cycle.

  13. The Model Localized Contact Stresses • Mechanical stresses are produced by contact between body parts and work objects. • Contact stress intensifies with increasing contact force and decreasing surface area. • Rated on a scale of 0-10. • Assess both “peak” and “average” ratings. • “Average” is based on duration, frequency and intensity. • Ratings reduced if gloves or other protective coverings used.

  14. The Model Miscellaneous • Static Exertions (Rated 0-10) • Vibration Exposure (Rated 0-10) • Temperature Extremes

  15. The Model Worksheet

  16. Questions

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